Pulley and sheath therefor



F. E. MATTHEWS.

PULLEY AND SHEATH THEREFOR.

APPLICATION FI'LED ,APR. 28, 1921.

Patented Oct. 11, 1921.

UNITED STATES PATENT oFricE.

FRANK E. MATTHEWS, 0F BRIDGEPORT, CONNECTICUT, ASSIGNOR TO .DANIEL J.

WILLIAMS AND-HENRY E. DINESON,

DOING BUSINESS "UNDER THE NAME OF THE CONNECTICUT TOOL AND ENGINEERING COMPANY, OF BRIDGEPORT, CON- 7 NECTICUT.

PULLEY AND SHEATH THEREFOR.

Specification of Letters Patent. Patented Oct 11 1921 Application filed April 28, 1921. Serial No. 465,156.

To all whom-2'25 may concern:

Be it known that I FRANK E. MATTHEWS, a citizen of the United States, and resident of Bridgeport, in the county of F airfield and State of Connecticut, have invented certain new and useful Improvements in Pulleys and Sheaths Therefor, of which the following is a specification.

The object of the present invention is to provide a novelly constructed pulley of simple, durable, practical and economical construction, thesame consisting of but a single piece of suitable sheet metal, and to equip the pulley with a one piece sheath of im- 1 proved design.

With the above and other objects in view, the invention comprises the construction, arrangement and combination of parts now to be fully described and hereinafter specifically claimed, it being understood that such changes in details of construction may be made as fall within the spirit of the invention and the scope of the claims.

In the accompanying drawing forming a part of this specification,

Figure 1 is a side elevational view of the improved pulley and sheath;

Fig. 2 is an edge view corresponding with Fig. 1;

Fig. 3 is a transverse sectional view of the pulley;

Fig. 4 is a plan view, on a reduced scale, of a blank for forming the sheath; and

Fig. 5 is a sectional view on line 5-5 in Fig. 2, looking in the direction of the arrows.

As already mentioned, both the pulley and sheath consist of but a single piece of suitable sheet metal.

The pulley may be formed from a disk of sheet metal, the body portion of said disk constituting the body portion 10 of said pulley, and said disk being shaped adjacent its margin to produce a groove 11 the central portion of which is in alinement with and supported by the body portion of said pulley. To this end the disk may be first bent in about the direction shown along the circumference denoted 12 to produce the flaring portion 13. It may then be bent in reverse direction along the circumference denoted 14 to produce the groove, as will be understood.

To supply a bearing for body portion 10,

nate arms extending in opposite directions from the body portion of the pulley. In constructing the arms to serve their purpose, each is first bent away from the body portion, preferably at approximate right-angles,

along the line denoted 19 and is then bent, preferably at right-angles, along the line denoted20 and toward the axis of the pulley, the portions of the arms which have openmgs 17 being in parallel relation to overlap and engage each other. Numeral 21 denotes a suitable bushing seated in all of openings 15 and 17 22 denotes the shaft of the pulley, and 23 denotes roller hearings in the bushing and surrounding the shaft.

In order that bushing 21 may be inserted in the bearing of the pulley without the liability of arms '16 first to receive the bushing becoming bent, the metal adjacent opening 15 may be drawn to provide an annular flange 24 extending from the body portion, and the metal adjacent opening 17 of that arm 16 which is closest said opening 15 may be correspondingly drawn to provide an annular flange 25, the arrangement being such that in the finished pulley the outer ends of said flanges rest against each other, as will central portion26 from which extend ears 27 and eye portions 28, said ears and eye portions, respectively, being located opposite each other. The cars are of general halfcircular configuration as disclosed, and in the finished sheath they are parallel with each other to incloseabout one-half of the pulley, the circumferential margins of said ears interlapping as best shown at 29 in Fig. 2. The eye portions 28 in the finished sheath constitute an eye 30 by means of which the sheath and pulley are supported.

In forming the sheath from the blank shown, said blank is bent at right-angles in the same direction along both of lines 31 to position the ears in parallel relation, the circumferential margins of said ears being then shaped to interlap in the manner already suggested. If preferred, the outer portions of said ears may be caused to flare,- as denoted at 32, for an obvious purpose. In producing eye the blank is'suitably bent along lines 33 and 84: to position the eye portions adjacent each other, and said portions are then made to interlap after the fashion" indicated at 35 and more particularlyshown in F-ig. 5;

Openings 36 in the sheath receive'the shaft of the pulley.

Havingthus fully described theinvention,

What-I claim and desire to secure by Letters provide apulley groove and constructed at its center to'pro'vide a bearing, said bearing comprising an-opening" in the metal of said pulley and openings inarms struck from said metahand said arms being positioned upon opposite sides of said pulley.

3. A pulley conslsting' of a single disk of sheet metal shaped at its margin to provide a pulley groove and constructed at its center struck from said disk and arranged at opposite sides thereof, sald arms having portlons arranged parallel W1th1 said diskand overlapping each other, and said; portions having With an annular flange and one of said arms 15 provided with a slmilar flange, said flanges adapted to engage each other for the purpose specified. j

6. A sheath consistingr of a single blank of sheet metal, said ,blank comprising a small central aortion parallel ears extendin 7 L b therefrom and adapted to inclose a pulley, I

figuration and the eye portions and ears, re-

spectively, interlap with each other.

Signed at Bridgeport, in the county of Fairfield, and State of Connecticut this26th day of April, A. 1921. to p'rovlde a bearing for said pulley, said" bearing comprising a plurality of arms FRANK- E. MATTHEWS. 

